Liquid crystal display device video having signal driving circuit mounted on one side

Abstract

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.

1. A liquid crystal display device comprising:
 a liquid crystal display panel including an upper shield casing accommodating at least one insulating substrate and having at least first and second sides, and a lower casing being connectable to the upper shield casing, the lower casing having at least first and second sides with one of the first side of the upper shield casing and the lower casing being provided with hooks and the other of the first side of the upper shield casing and the lower casing being provided with projections for receiving the hooks and enabling connection of the upper shield casing and the lower casing, and one of the second side of the upper shield casing and the lower casing having fixing pawls and the other of the second side of the upper shield casing and the lower casing having recesses for receiving the fixing pawls so as to enable connection of the upper shield casing and the lower casing.    
     
     
       2. A liquid crystal display device according to  claim 1 , wherein the upper shield casing accommodates first and second insulating substrates superposed at a predetermined gap such that faces thereof are respectively formed with electrodes and an orientation film and are opposed to each other, in which said two substrates are adhered to each other through a seal member applied in a frame shape on edge portions between said two substrates while sealing a liquid crystal in said seal member between said two substrates, and in which a plurality of scanning signal lines and video signal lines arrayed on a surface of said first insulating substrate have their individual terminals disposed outside of said seal member; and
 wherein a video signal line driving circuit substrate is arranged on only one longer sides of said liquid crystal display panel and is connected with the terminals of said video signal lines.    
     
     
       3. A liquid crystal display device according to  claim 2 ,
 wherein no circuit substrate is arranged at the other side of said display panel which is arranged with said video signal line driving circuit substrate.    
     
     
       4. A liquid crystal display device according to  claim 2 ,
 a light guide plate arranged below said liquid crystal display panel,    a fluorescent tube arranged in the vicinity of at least one side face of said light guide plate,    and a plurality of tape carrier packages arranged on the outer peripheral portion of said liquid crystal display panel;    wherein said fluorescent tube is arranged below said plurality of tape carrier packages.    
     
     
       5. A liquid crystal display device according to  claim 1 , wherein at least one of the upper shield casing and the lower casing accommodate a backlight therein and disassembly of a connected upper shield casing and lower casing for repair of the backlight is enabled by removing a portion of the fixing pawls. 
     
     
       6. A liquid crystal display device according to  claim 1 , wherein the first and second sides are arranged on opposite sides of the upper shield casing and the lower casing. 
     
     
       7. A liquid crystal display device according to  claim 1 , wherein at least one circuit substrate is accommodated in at least one of the upper shield casing and the lower casing and on circuit substrate is arranged in the first side of the upper shield casing and the lower casing. 
     
     
       8. A liquid crystal display device comprising:
 a first circuit substrate arranged outside of a first side of a liquid crystal display panel for driving signal lines,    a second circuit substrate arranged outside of a second side adjacent to and perpendicular to said first side and having a connector for connection with the outside,    a first casing having a first mounting hole in the vicinity of its corner for accommodating said liquid crystal display panel and said first and second circuit substrates,    a back light disposed with respect to said liquid crystal display panel,    and a second casing having a second mounting hole aligned with said first mounting hole for accommodating said back light;    wherein said first casing and said second casing are united together, said second circuit substrate is equipped with an electronic part disposed at its end portion most remote from said first circuit substrate, said connector of said second circuit substrate is arranged adjacent to said electronic part and extends in a direction substantially parallel to said second side;    a plurality of circuit substrates divided and arranged at the two, three or four sides of an outer peripheral portions of said liquid crystal display panel,    and a casing for accommodating said liquid crystal display panel and said circuit substrates together and formed with mounting holes,    wherein at least one of said mounting holes is arranged at a distance from a corner of said casing, and in that said circuit substrate having a generally rectangular shape with corners are divided into a plurality of sheets and are electrically connected in a vicinity of said corners by joiners.    
     
     
       9. A liquid crystal display device according to  claim 8 ,
 wherein said mounting holes are positioned at intermediate portions spaced at a predetermined distance from the corners of said casing and in a drawn portion which is made integral with a metal plate forming said casing and which forms a parallel plane at a different level as that of said metal plate,    said drawn portion is given generally a quadrant shape,    said quadrant shape is formed with a notch in its radial portion between said drawn portion and said metal plate adjacent to said drawn portion.    
     
     
       10. A liquid crystal display device according to  claim 8 ,
 wherein said circuit substrates are electrically connected with each other through at least two joiners which are superposed at two or more stages in a thickness direction of said display device.    
     
     
       11. A liquid crystal display device comprising:
 a first circuit substrate arranged outside of a first side of a liquid crystal display panel for driving signal lines,    a second circuit substrate arranged outside of a second side adjacent to and perpendicular to said first side and having a connector for connection with the outside, and a signal source integrated circuit,    a first casing having a first mounting hole in a vicinity of a corner for accommodating said liquid crystal display panel and said first and second circuit substrates,    and a second casing having a second mounting hole aligned with said first mounting hole for uniting said first casing;    wherein said connector disposed between said first circuit substrate and said signal source integrated circuit, said connector of said second circuit substrate is arranged adjacent to said signal source integrated circuit and extends in a direction substantially parallel to said second side.    
     
     
       12. A liquid crystal display device comprising:
 a liquid crystal display panel having longer sides and shorter sides;    a video signal line driving circuit substrate connected to only one of said longer sides of said liquid crystal display panel;    a light guide plate arranged below said liquid crystal display panel;    a fluorescent tube arranged on at least one side face of said light guide plate;    a shield casing for accommodating the circumferential portion of said liquid crystal display panel;    a mold casing monolithically molded for accommodating said light guide plate and said fluorescent tube;    two cables having respective one ends thereof connected with two ends of said fluorescent tube;    first and second retaining members for retaining the two ends of said fluorescent tube, respectively; and    first, second and third grooves integral with said mold casing;    wherein said first and second grooves respectively accommodate said first and second retaining members so that said first and second retaining members are snugly fitted therein;    at least one of said two cables is accommodated in said third groove which is integral with a side wall of said mold casing;    said shield casing and said mold casing being coupled together; and    said third groove and said fluorescent tube being arranged to extend along one of said longer sides of said liquid crystal display panel.    
     
     
       13. A liquid crystal display device according to  claim 12 , wherein said third groove of said mold casing extends in a direction of extension of said fluorescent tube. 
     
     
       14. A liquid crystal display device according to  claim 12 , wherein said third groove of said mold casing is proximate to said fluorescent tube. 
     
     
       15. A display device comprising:
   a substrate;        a scanning signal line and a video signal line formed on the substrate;        a thin film transistor connected to the scanning signal line and the video signal line and formed on the substrate;        a scanning signal drive IC chip electrically connected to the scanning signal line;        a video signal drive IC chip electrically connected to the video signal line;        a print circuit board electrically connected to at least the scanning signal drive IC chip; and        a substantially rectangular metallic shield case having two longer sides and two shorter sides includes a first longer side adjacent to the video signal drive IC chip and a second longer side opposite to the first longer side, the metallic shield case covering a peripheral portion of the substrate and including a first mounting hole adjacent to the first longer side for receiving a screw for fixing the display device to a set device;        wherein the scanning signal drive IC chip is supplied with a clock and a power from the print circuit board, and        wherein the first mounting hole is disposed between the first longer side and the second longer side of the metallic shield case.     
     
     
       16. A display device according to  claim 15 , wherein the scanning signal drive IC chip is mounted on a first flexible wiring substrate, and the clock and the power from the print circuit board is supplied via the first flexible wiring substrate. 
     
     
       17. A display device according to  claim 16 , wherein the metallic shield case comprises a shorter side having the first mounting hole and a second mounting hole, the first mounting hole being positioned nearer to the video signal drive IC chip than the second mounting hole. 
     
     
       18. A display device according to  claim 17 , wherein no video signal drive IC chip is arranged adjacent to the second longer side. 
     
     
       19. A display device according to  claim 15 , wherein the video signal drive IC chip is mounted on a second flexible wiring substrate, and the print circuit board is bonded to the second flexible wiring substrate. 
     
     
       20. A display device comprising:
   a substantially rectangular substrate having two longer sides and two shorter sides;        a plurality of scanning signal lines and a video signal line formed on the substrate;        a thin film transistor connected to one of the plurality of scanning signal lines and the video signal line and formed on the substrate;        a plurality of scanning signal drive IC chips electrically connected to the plurality of scanning signal lines and mounted on a plurality of first flexible wiring substrates;        a video signal drive IC chip electrically connected to the video signal line and mounted on a second flexible wiring substrate; and        a print circuit board bonded to the second flexible wiring substrate and electrically connected to the plurality of scanning signal drive IC chips; and        wherein the plurality of scanning signal drive IC chips is supplied with a clock and a power from the print circuit board via the plurality of first flexible wiring substrates; and        wherein the video signal drive IC chip is arranged at only one longer side of the substrate.     
     
     
       21. A display device according to  claim 20 , further comprising a substantially rectangular metallic shield case having two longer sides and two shorter sides and comprising a first longer side adjacent to the video signal drive IC chip and a second longer side opposite to the first longer side, the metallic shield case covering a peripheral portion of the substrate and including a mounting hole adjacent to the first longer side for receiving a screw for fixing the display device to a set device, the mounting hole being disposed between the first longer side and a second longer side of the metallic shield case. 
     
     
       22. A display device comprising:
   a substrate;        a scanning signal line and a video signal line formed on the substrate;        a thin film transistor connected to the scanning signal line and the video signal line and formed on the substrate;        a scanning signal driving circuit electrically connected to the scanning signal line;        a video signal driving circuit electrically connected to the video signal line; and        a fluorescent tube lamp comprising a first terminal connected to a first lamp cable and a second terminal connected to a second lamp cable;        wherein the first terminal is covered by a first rubber bush and the second terminal is covered by a second rubber bush, and the first lamp cable is held by the first rubber bush, and the first lamp cable and the second lamp cable are held by the second rubber bush.     
     
     
       23. A display device according to  claim 22 , further comprising a reflective sheet disposed between the video signal driving circuit and the fluorescent tube lamp. 
     
     
       24. A display device according to  claim 22 , further comprising a mold case comprising a groove for holding the first lamp cable. 
     
     
       25. A display device according to  claim 24 , further comprising a reflective sheet disposed between the video signal driving circuit and the fluorescent tube lamp. 
     
     
       26. A display device according to  claim 22 , wherein the second terminal has a rounded shape, and is connected to the second lamp cable in the second rubber bush.